Transmission-band



J. HENRY.

TRANSMISSION BAND. APPLiCATION FILED JUNE 3.1920.

1,378,862. Patented May 24, 1921;

PATENT OFFICE.

JosErH nn mnor PHILADELPHIA, PENNSYLVANIA.

' TRANSMISSION-BAND.

I J-Specification of Letters Patent. Patented May2-1, 1921.

Applicationfiled June 3, 1920. Serial No. 386,233.

To all whom it may concern v Be it known that I, J osnrn' HENRY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Transmission-Bands, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to transmission bands and more particularly to that type of transmission band adapted to engage a rotating drum or the like when compressed.

In this type of band, the band proper is provided at its ends with lugs which are slotted to receive an operating member. One end of the band is held stationary, in

any suitable manner, usually by' abutting some solid surface. The other end of the band is drawn toward the last named end by means of the operating member in order to tighten the band about the drum.

It has been found that the stationary end, due no doubt to the pull exerted thereon by the shifting of the opposite end of the band, will drop down upon the drum and cause unpleasant chattering. Furthermore, this chattering tears the band lining and soon destroys it, adding greatly to the cost of operation.

The present invention consists in means for locking the stationary end to prevent contact of the same with the drum and thereby eliminate the above difficulties.

These results I have attained by the structure illustrated in the accompanying drawings, in which:

Figure 1 is a perspective of the band having the lugs thereof constructed in a manner suitable to accomplish the purposes of my invention.

Fig. 2 is a similar perspective showing the operating shaft in position.

Fig. 3 is a sectional view taken through the lug and end of the band showing the counterbore when receiving the end of the spring, and i Fig. 4 is a section taken on the line 1-4: of Fig. 2, looking in the direction of the arrow.

Referring now more particularly to the drawings, the numeral 10 indicates a transmission band having secured to the ends thereof lugs 11 and 12. The lugs 11 and 12 are provided with upstanding portions 13 provided centrally with slots 14 adapted to recelve therein an operatingshaft 15.

A spring surrounds the operating shaft intermediate the upstanding portions 13 of the lugs and the end ofthe operating shaft is provided with a washer 17 bearing against the lug 11 and adjusted by means of a nut 18. The structure above described is that at present in use upon the Ford automobile, being used therein for foot brake and transmission drum bands.

As hereinbefore set forth, this structure will allow the lugs 12 to move downwardly together with its associated end of the band 10 when. the operating shaft 15 is shifted in the direction of the arrow. This I have prevented by providing in the face of the upstanding portion 13 of the lug 12, a counterbore 19 which is adapted to receive an end of the spring 16. This counterbore, as more clearly shown in Figs. 3 and 4, is eccentric to the curvature of the bottom of the slot 14: and is so formed as to allow just hold the same firmly in the bottom of the slot lat, preventing downward displacement of the lug 12.

It has been found in actual practice that the structure described will allow of a full three quarters of the brake band or transmission band to engage the drum and that it will effectually eliminate the chatter. That this chattering has a tendency to destroy the material of the band lining is illustrated by the fact that with my improved structure the lining does not tear away from the band and may be used until entirely worn away.

While I have described one specific means whereby the lug 12 may be held against downward movement, it is obvious that other means of a similar character may be adopted and used without in any manner a lug embodying an upstanding portion pro- I vided with a slot, one of said lugs being provided, in the face thereof adjacent the other said lugs, with a counterbore.

2. In a device of the type described, a band provided upon each end thereof with a lug embodying an upstanding portion provided with a slot, one of said lugs being provided, in the face thereof adjacent the other said lugs, with a counterbore, said counterbore being eccentrically disposed with relation to said slot.

3. In a device of the class described, a substantially circular band provided upon each end thereof with a lug embodying an upstanding portion provided with a slot, an operating shaft extending through said slots, a spring disposed about said operating shaft intermediate said upstanding portions, and means embodied in one of said lugs for engaging said spring and forcing the same into engagement with said operating shaft, whereby said operating shaft is held firmly seated in the bottom of the slot of said last named lug;

In testimony whereof I hereunto affix my signature. JOSEPH HENRY. 

